{"id":"CVE-2026-98611","title":"bpf: Check params size before reading reserved fields","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Check params size before reading reserved fields\n\nbpf_crypto_ctx_create() is a kfunc whose second argument is declared\nwith the __sz annotation, so the verifier on…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 3e1c6f35409f9e447bf37f64840f5b65576bfb78 < e03253f5d65ebcd2a6d479f140c3bd9c7e4fb84a","Linux >= 3e1c6f35409f9e447bf37f64840f5b65576bfb78 < cd12d3e08620257fbcaa262785d7f4b9473afc7a","Linux >= 3e1c6f35409f9e447bf37f64840f5b65576bfb78 < 86a0e945fb645ea90233fde239cd2de79f01974c","Linux >= 3e1c6f35409f9e447bf37f64840f5b65576bfb78 < a11212910cf09b2fe8db9afa41ef60c4f81879c5","Linux 6.10"],"published":"2026-10-18","updated":"2026-10-18","sourceUpdated":"2026-10-18T15:19:26.922Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98611","references":[{"url":"https://git.kernel.org/stable/c/e03253f5d65ebcd2a6d479f140c3bd9c7e4fb84a"},{"url":"https://git.kernel.org/stable/c/cd12d3e08620257fbcaa262785d7f4b9473afc7a"},{"url":"https://git.kernel.org/stable/c/86a0e945fb645ea90233fde239cd2de79f01974c"},{"url":"https://git.kernel.org/stable/c/a11212910cf09b2fe8db9afa41ef60c4f81879c5"}],"tags":["cve.org"],"ingestedAt":"2026-10-18T15:45:12.241Z","slug":"CVE-2026-98611","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Check params size before reading reserved fields\n\nbpf_crypto_ctx_create() is a kfunc whose second argument is declared\nwith the __sz annotation, so the verifier only guarantees that\nparams__sz bytes of params are valid.  The function nevertheless reads\nparams->reserved[0] and params->reserved[1] (offsets 14 and 15) before\ncomparing params__sz against the size of struct bpf_crypto_params, so a\nBPF program can pass a shorter buffer and have the kernel read past the\nregion that was validated for it.\n\nMove the size check in front of the reserved field reads.\n\n## Affected\n\n- `Linux >= 3e1c6f35409f9e447bf37f64840f5b65576bfb78 < e03253f5d65ebcd2a6d479f140c3bd9c7e4fb84a`\n- `Linux >= 3e1c6f35409f9e447bf37f64840f5b65576bfb78 < cd12d3e08620257fbcaa262785d7f4b9473afc7a`\n- `Linux >= 3e1c6f35409f9e447bf37f64840f5b65576bfb78 < 86a0e945fb645ea90233fde239cd2de79f01974c`\n- `Linux >= 3e1c6f35409f9e447bf37f64840f5b65576bfb78 < a11212910cf09b2fe8db9afa41ef60c4f81879c5`\n- `Linux 6.10`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}